A176994 - cp's OEIS frontend

A176994 Least odd prime p such that p#*2^n-1 is prime, with p# the primorial A034386(p).

n	a(n)
0	3
1	3
2	3
3	3
4	5
5	3
6	3
7	7
8	7
9	5
10	3
11	109
12	17
13	5
14	13
15	17
16	5
17	3
18	17
19	67
20	11
21	89
22	13
23	17
24	7
25	89
26	31
27	29
28	19
29	37
30	5
31	7
32	29
33	3
34	79
35	43
36	41
37	3
38	11
39	53
40	5
41	13
42	3
43	29
44	11
45	137
46	179
47	227
48	11
49	11
50	97
51	59
52	53
53	11
54	3
55	83
56	17
57	47
58	19
59	19
60	29
61	73
62	41
63	3
64	7
65	11
66	79
67	71
68	13
69	41
70	257
71	19
72	5
73	151
74	79
75	3
76	31
77	19
78	79
79	5
80	281
81	5
82	37
83	263
84	139
85	17
86	23
87	127
88	223
89	151
90	149
91	131
92	113
93	3
94	47
95	41
96	59
97	31
98	23
99	89

[3, 3, 3, 3, 5, 3, 3, 7, 7, 5, 3, 109, 17, 5, 13, 17, 5, 3, 17, 67, 11, 89, 13, 17, 7, 89, 31, 29, 19, 37, 5, 7, 29, 3, 79, 43, 41, 3, 11, 53, 5, 13, 3, 29, 11, 137, 179, 227, 11, 11, 97, 59, 53, 11, 3, 83, 17, 47, 19, 19, 29, 73, 41, 3, 7, 11, 79, 71, 13, 41, 257, 19, 5, 151, 79, 3, 31, 19, 79, 5, 281, 5, 37, 263, 139, 17, 23, 127, 223, 151, 149, 131, 113, 3, 47, 41, 59, 31, 23, 89]

cp's OEIS Frontend

A176994 Least odd prime p such that p#*2^n-1 is prime, with p# the primorial A034386(p).

Table of values

List of values

n	a(n)
0	3
1	3
2	3
3	3
4	5
5	3
6	3
7	7
8	7
9	5
10	3
11	109
12	17
13	5
14	13
15	17
16	5
17	3
18	17
19	67
20	11
21	89
22	13
23	17
24	7
25	89
26	31
27	29
28	19
29	37
30	5
31	7
32	29
33	3
34	79
35	43
36	41
37	3
38	11
39	53
40	5
41	13
42	3
43	29
44	11
45	137
46	179
47	227
48	11
49	11
50	97
51	59
52	53
53	11
54	3
55	83
56	17
57	47
58	19
59	19
60	29
61	73
62	41
63	3
64	7
65	11
66	79
67	71
68	13
69	41
70	257
71	19
72	5
73	151
74	79
75	3
76	31
77	19
78	79
79	5
80	281
81	5
82	37
83	263
84	139
85	17
86	23
87	127
88	223
89	151
90	149
91	131
92	113
93	3
94	47
95	41
96	59
97	31
98	23
99	89

n	a(n)
0	3
1	3
2	3
3	3
4	5
5	3
6	3
7	7
8	7
9	5
10	3
11	109
12	17
13	5
14	13
15	17
16	5
17	3
18	17
19	67
20	11
21	89
22	13
23	17
24	7
25	89
26	31
27	29
28	19
29	37
30	5
31	7
32	29
33	3
34	79
35	43
36	41
37	3
38	11
39	53
40	5
41	13
42	3
43	29
44	11
45	137
46	179
47	227
48	11
49	11
50	97
51	59
52	53
53	11
54	3
55	83
56	17
57	47
58	19
59	19
60	29
61	73
62	41
63	3
64	7
65	11
66	79
67	71
68	13
69	41
70	257
71	19
72	5
73	151
74	79
75	3
76	31
77	19
78	79
79	5
80	281
81	5
82	37
83	263
84	139
85	17
86	23
87	127
88	223
89	151
90	149
91	131
92	113
93	3
94	47
95	41
96	59
97	31
98	23
99	89

n	a(n)
0	3
1	3
2	3
3	3
4	5
5	3
6	3
7	7
8	7
9	5
10	3
11	109
12	17
13	5
14	13
15	17
16	5
17	3
18	17
19	67
20	11
21	89
22	13
23	17
24	7
25	89
26	31
27	29
28	19
29	37
30	5
31	7
32	29
33	3
34	79
35	43
36	41
37	3
38	11
39	53
40	5
41	13
42	3
43	29
44	11
45	137
46	179
47	227
48	11
49	11
50	97
51	59
52	53
53	11
54	3
55	83
56	17
57	47
58	19
59	19
60	29
61	73
62	41
63	3
64	7
65	11
66	79
67	71
68	13
69	41
70	257
71	19
72	5
73	151
74	79
75	3
76	31
77	19
78	79
79	5
80	281
81	5
82	37
83	263
84	139
85	17
86	23
87	127
88	223
89	151
90	149
91	131
92	113
93	3
94	47
95	41
96	59
97	31
98	23
99	89